Latitude, Longitude, Time Zones and the International Date Line

Transcription

1 Latitude, Longitude, Time Zones and the International Date Line Globes and maps often have lines that help explain where places are. These lines are often called imaginary lines because they don t really exist on the Earth. But they are helpful for navigation or describing where things are. Navigation refers to finding your way. Ships and airplanes have navigation systems. You may have seen a GPS system in a car. It is used for navigation or helping people find where they want to go. Some of these imaginary lines are lines of latitude, lines of longitude, time zones and the International Date Line. Lines of latitude and longitude are measured using degrees. The symbol for degrees is. Lines of Latitude Lines of latitude go straight across the Earth. The most important line of latitude is the equator. The equator is 0 degrees. The equator divides the Earth into two hemispheres. The Northern Hemisphere is above the equator. The Southern Hemisphere is below the equator.

2 The Tropics The Tropics is an area that goes around the middle portion of the Earth. The Tropics lie between the Tropic of Cancer and the Tropic of Capricorn. Areas in the Tropics are warm all year round. The Tropics has many rainforests, including the Amazon Rainforest in South America and the Congo Rainforest in Africa. Lines of Longitude Lines of longitude go up and down. They go through the North Pole and the South Pole. The Prime Meridian is the most important line of longitude. It is 0 degrees. It passes through the Royal Observatory in Greenwich, England.

3 Time Zones Because the Earth spins, it is day or night at different times in different places. The Earth is divided into time zones, so that 9 o clock AM is always morning no matter where you are in the world. As you can see on this map, when it is 3pm in the Pacific time zone it is 4pm in the Mountain time zone, 5pm in the Central time zone and 6pm in the evening in the Eastern time zone. However, in Tokyo, Japan it is almost morning of the next day.

4 International Date Line The line that is on the opposite side of the Earth to the Prime Meridian is the International Date Line. It divides the Earth into the Eastern and Western Hemispheres. It is at about 180 degrees. This line separates one day from the next. When someone crosses the International Date Line they go to the next day or the previous day depending on which way they travel. In this picture, the pink lines are time zones. The black line on the right is the International Date Line. You will see that it isn t a straight line.

5 What line is being shown in each picture? Circle the correct answer in each box: International Date Line Lines of latitude Time Zones Lines of longitude The Tropics Time Zones Time Zones The Tropics International Date Line

6 Circle the correct answer: 1. Lines of Latitude Earth. (go up and down the) (across the) 2. Lines of Longitude go through the. (North and South Poles)(equator) 3. We use to divide the Earth up into different times. (time zones)(international Date Line) 4. The International Date Line divides the Earth into two hemispheres. They are the. (Northern and Southern Hemispheres) (Western and Eastern Hemispheres) 5. The equator divides the Earth into two hemispheres. They are the. (Northern and Southern Hemispheres) (Western and Eastern Hemispheres) 6. Circle all lines that are 0 degrees: Equator International Date Line Prime Meridian 7. Which line is 0 degrees latitude? Prime Meridian Equator 8. Which line is 180 degrees longitude? Prime Meridian International Date Line 9. Which line is 0 degrees longitude? Prime Meridian Equator All Contents 2012 EarlyKnowledgeforKids.org The images are in the Public Domain and may be used by others. No part of Latitude, Longitude, Time Zones and the International Date Line may be reproduced or distributed in any form or by any means, or stored in a database or retrieval system. Multiple copies may be made for personal or classroom use but may not be distributed in any way.